Pent Up Anger

Is it me or does Christmas sometimes bring out the worst in people? While reading the newspaper, I stumbled upon an article that told a story about a 45 year old man who had no record or history of violence who recently just got a divorce and ended up killing and injuring people at his ex-wife's Christmas Eve party. Some of those people included children. When he first knocked on the door, and eight year old girl answered. He was dressed up as Santa Clause. He pulled out a handgun and shot her in the face and then moved on to the rest of the party. He then killed himself afterward over at his brother's house 25 miles away. Some people call this "insanity". Scientifically, yes it can be called insanity for the amount of rage that one can delve into. But personally, I do "believe" that it's pure evil---not in the general sense either. Many years ago and still in some countries, people would have called it "being possessed by the devil"....